Improvement in drop-hammers



.|. TBIN.

Drop-Hammers. u

NO. 145,601, Patented Dec. 16,1873.

WMJMS *772;2337

MM l L l fwd UNITED STATES PATENT OFFICE.

JEREMIAH TOBIN, OF NEWARK, NEW JERSEY.

IMPROVEMENT IN DROP-HAMMERS.

Speciiication forming part o1" Letters Patent No. 145,60 l, dated December 1G, 1873; application filed July 15, 1873.

To all whom it may concern:

Be it known that I, JEREMIAH T0131N,of the city of Newark,in the county of Essex and State of New Jersey, have invented certain Improvements in the Construction of Trip- Hammers, of which the following is a specification:

` The object of the improvement is principally to preclude the friction and jarring, and the wear and tear, consequent upon the use of a lever-helve, with a fulcrum-gudgeon vibrating in journal-boxes, in trip-hammers operated by tappets. This object I attain by dispensing with a helve, and making the tappet-wheel act direct upon the hammer.

Figure l is a front elevation of my invention. Fig. 2 is a side elevation of the same, and Fig. 3 a detached view of the tappet-wheel and hammer.`

Arepresents the frame, of any desired shape or size. Secured to the shaft 5, journaled upon its top, are the driving-pulley H, tappet-wheel B, and ily-wheel G. The tappets of the wheel B, in revolving, catch under a shoulder, projection, or recess, Z, of any suitable kind, on the back of the hammer C, sliding in guides or ways in the front end of the frame, and'lift it upward the desired distance, and then let it fall again. To the top of the hammer is secured a screw-rod, Y, which extends upward through the cross-bar X between the two sides of the frame A, and which has a rubber or other suitable spring, 1 2, passed over it on each side of the barf/ Above and below the two springs are placed the regulating-nuts 3 4, which control the length of the stroke of the hammer, and the tension of the two springs upon it, so as to cause it to fall with greater or less force@ The anvil, placed underneath the hammer, consists of a wooden base, E, on which is placed the metal anvil-block D, hav

ing the ears or projections 6 formed upon its top. Between these ears is placed the anvil F, having a suitable striking-point, 7, dovetailed in its top, which corresponds in size or shape to the piece dovetailed in the under side of the hammer. These two parts can be taken out and replaced by others of a different size or shape when so desired. The anvil-block D has a suitable recess formed in its under side, which acts as a socket to receive the top, or a tenon formed on the top of the wooden base E, so as to prevent the wood from splitting, and to enable the anvil to be made adjustable up and down. By adjusting the lower regulating-nut 4l up or down upon the screw-rod, the spring l can be made to add more or less power to the stroke ofthe hammer, as may be desired, and by screwing down the upper nut 3, the upper spring 2 is made to lessen the force of the stroke at pleasure. l Thus it will be seen that by the use of th two nuts and springs, the hammer is under the most complete control of the operator, so that it can be used for either light or heavy work./

Having thus described my invention, I claim- 1. The combination of the hammer C, screwrod Y, spring 2, and. nut 3, substantially as shown and described.

2. 'I he hammer C, screw-rod Y, springs 1 2, stationary cross-piece X, and regulating-nuts 3 4, combined for operation substantially as set forth.

/3. The combination of the tappet-wheel B, hammer G, screw-rod Y, springs l 2, nuts 3 4, bar X, and` an anvil, substantially as shown.

` J EREMIAH TOBIN.

Witnesses:

W. M. GooDrNG, EDWARD OoLLvEE. 

